Windows 7 and Vista Installation Notes
In order to run WEPP under Windows Vista WEPP should be installed in a location other than c:\program files
The default installation directory for the current WEPP install (v2012.8) is c:\wepp. The progam can also be installed under the users My Documents directory.
WEPP uses subdirectories under its install location for model input and output files. Under Windows 7 and Vista 'c:\program files' is read-only.